funniest old wive's tale about pregnancy

Hi! There are quite many funny old wive's tale about pregnancy that i have heard from my mom and the old generation. I think the funniest one is that if pregnant women drink too much chocolate milk, then the skin of the baby will become black. I don't know why my mom believes in this. Everytime i drink the chocolate milk, she will say this tale to me. How riduculous it is!